Narrative:

First officer was at the controls during taxi; during rudder bias check (we) noticed a nose shimmy. Immediately we stopped on the taxiway and the captain was getting out of his seat; as we believed the shimmy to be an unattached steering pin. (The aircraft was towed about 45 mins prior to taxi.) at that time I informed ground that we had an indication to check. During the conversation; the captain had opened the door to exit the aircraft to check or reattach the steering pin. At that time the ground ATC said; 'no one may exit the aircraft.' I yelled out to the captain to relay this information; but he was half way out the door. The engines were running so there was 'no way' he could have heard me. I remained at the controls with the park brake on. The captain returned to station and ATC wanted pilot information and instructed the PIC to call hpn upon landing at destination. Normal taxi and takeoff was performed. There was no danger to any persons or property during the event; which was about 45 seconds. Upon reaching destination; the captain called hpn and had a discussion. All was understood and hpn dropped any pending FAA consultations.

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Original NASA ASRS Text

Title: CE560 FLT CREW REMOVES NOSEWHEEL SCISSORS PIN FOR TOW IN TO PARKING THEN FORGETS TO REINSTALL PRIOR TO TAXI. WHEN OMISSION IS DISCOVERED ACFT IS STOPPED ON TXWY AND CAPTAIN RUNS OUT TO REINSTALL THE PIN.

Narrative: FO WAS AT THE CTLS DURING TAXI; DURING RUDDER BIAS CHK (WE) NOTICED A NOSE SHIMMY. IMMEDIATELY WE STOPPED ON THE TXWY AND THE CAPT WAS GETTING OUT OF HIS SEAT; AS WE BELIEVED THE SHIMMY TO BE AN UNATTACHED STEERING PIN. (THE ACFT WAS TOWED ABOUT 45 MINS PRIOR TO TAXI.) AT THAT TIME I INFORMED GND THAT WE HAD AN INDICATION TO CHK. DURING THE CONVERSATION; THE CAPT HAD OPENED THE DOOR TO EXIT THE ACFT TO CHK OR REATTACH THE STEERING PIN. AT THAT TIME THE GND ATC SAID; 'NO ONE MAY EXIT THE ACFT.' I YELLED OUT TO THE CAPT TO RELAY THIS INFO; BUT HE WAS HALF WAY OUT THE DOOR. THE ENGS WERE RUNNING SO THERE WAS 'NO WAY' HE COULD HAVE HEARD ME. I REMAINED AT THE CTLS WITH THE PARK BRAKE ON. THE CAPT RETURNED TO STATION AND ATC WANTED PLT INFO AND INSTRUCTED THE PIC TO CALL HPN UPON LNDG AT DEST. NORMAL TAXI AND TKOF WAS PERFORMED. THERE WAS NO DANGER TO ANY PERSONS OR PROPERTY DURING THE EVENT; WHICH WAS ABOUT 45 SECONDS. UPON REACHING DEST; THE CAPT CALLED HPN AND HAD A DISCUSSION. ALL WAS UNDERSTOOD AND HPN DROPPED ANY PENDING FAA CONSULTATIONS.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.